US3847049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting tool having a reciprocating punch with a carrier member interconnecting a head portion and a die portion
Assignee: Trumpf Maschinen AG
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Filing: 1973-06-12
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Granted: 1974-11-12
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Expires: 1993-06-12
Abstract
Abstract A cutting tool particularly a nibbler which has a reciprocating punch which is arranged to reciprocate in a bore of a head portion includes a reduced cross sectional portion which slides on a complimentarily reduced cross sectional portion of a carrier member. The carrier member is engaged in the bore of a die member and holds the die member at a spaced location from the head portion. In addition a reduced cross sectional area of the carrier member defines a slideway with the lower end of the reciprocating punch which has a reduced cross sectional portion at its lower end which is complementary to the reduction of cross section of the carrier member so that both the punch and the carrier member may be accommodated in the bores of the head portion and the die member.
Inventors
- 👤 H Bitzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:56
CPC Classifications
B; B23; B23D; B23D27/00; Y; Y10; Y10S; Y10S83/00; Y10S83/916; Y10T; Y10T83/00; Y10T83/869; Y10T83/8821; Y10T83/8878; Y10T83/929; Y10T83/9411; Y10T83/9442; Y10T83/9444
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
A cutting tool such as a nibbler having a motor driven reciprocatable punch, comprising a head portion having a bore therein, a die member having a bore and being spaced from said head portion to define a workpiece receiving access therebetween, a carrying memBer engaged in the bores of and secured to said head portion and said die member and having a reduced cross sectional area at a location extending between said head portion and said die member and a predetermined distance into said head portion and said die member, a punch rod member reciprocatable in the bore of said head portion and having a portion of reduced cross section complementary to and slideable on the reduced cross section of said carrying member, the arrangement being such that the total cross section of said punch and said carrying member conforms to the bores of said head portion and said die member, said reduced cross sectional portion of said punch being movable during operation into the space between said head portion and said die member to cut the workpiece positioned therebetween.
Claim 2
Dependent Claim
180 words
A cutting tool such as a nibbler having a motor driven reciprocatable punch, comprising a head portion having a bore therein, a die member having a bore and being spaced from said head portion to define a workpiece receiving access therebetween, a carrying memBer engaged in the bores of and secured to said head portion and said die member and having a reduced cross sectional area at a location extending between said head portion and said die member and a predetermined distance into said head portion and said die member, a punch rod member reciprocatable in the bore of said head portion and having a portion of reduced cross section complementary to and slideable on the reduced cross section of said carrying member, the arrangement being such that the total cross section of said punch and said carrying member conforms to the bores of said head portion and said die member, said reduced cross sectional portion of said punch being movable during operation into the space between said head portion and said die member to cut the workpiece positioned therebetween.
Claim 3
Dependent Claim
24 words
A cutting tool according to claim 1, wherein said carrying member includes a mounting rim in said head portion extending outwardly of said punch.
Claim 4
Dependent Claim
75 words
A cutting tool according to claim 2, wherein said head portion includes a widened diameter bore portion spaced inwardly from the end thereof which is adjacent to said die member and defining a shoulder between said wider bore portion and the bore of said head portion, said mounting rim resting on said shoulder, and a retaining piece arranged in said wider bore portion engaged over said mounting rim and holding said carrier member against rotation.
Claim 5
Dependent Claim
31 words
A cutting tool according to claim 1, wherein said carrying member includes a bore of the same diameter as the bore of said head portion in which said punch is slidable.
Claim 6
Dependent Claim
28 words
A cutting tool according to claim 1, including a transverse pin extending between said carrying member and said head portion for holding said parts relative to each other.
Claim 7
Dependent Claim
43 words
A cutting tool according to claim 1, wherein said bore of said head portion includes a widened portion having a carrier sleeve therein, said carrier member having a transversely extending portion extending outwardly into said widened bore and engaged with said carrier sleeve.
Claim 8
Dependent Claim
16 words
A cutting tool according to claim 1, wherein said punch has a semi annular cross section.
Claim 9
Dependent Claim
19 words
A cutting tool according to claim 1, wherein said punch has a cross section which is substantially semi circular.
Claim 10
Dependent Claim
39 words
A cutting tool according to claim 1, wherein said punch is substantially semi annular and includes an extension extending beyond a semi annular configuration on each side, said punch and said carrying member together defining a circular cross section.
Claim 11
Dependent Claim
22 words
A cutting tool according to claim 1, wherein said punch is provided with an upper end having an externally threaded pin portion.
Claim 12
Dependent Claim
104 words
A cutting tool according to claim 1, wherein said punch and said carrying member together define a circular cross section, said head portion and said die member having circular cross sectional bores, the stroke of said punch being such that there is a space between said punch and the top of said die member at the lowermost end of the movement of said punch, said die member having a recess defined by said bore between said die member and the reduced cross section of said carrier member, and a chip removal slot extending into the side of said die member communicating with said recess.
Claim 13
Dependent Claim
41 words
A cutting tool according to claim 11, wherein said punch and said carrying member have cross sections which are complementary and which together form a circular cross section and wherein said punch and said carrier member have substantially the same diameters.
Claim 14
Dependent Claim
32 words
A cutting tool according to claim 12, wherein said carrier member is secured to said die member by a transverse pin extending between portions of said carrier member and said die member.
References Cited (Backward Citations)
US3025600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |